Thank you all for your answers, i do have servers with multiple cpu up to 6 cores.
I'm mining XMG trought maxminers pool; but the income isn't as i want...
15 worker with 3 thread per worker, and the daily income is 1-2$ "10xmg..."

Is is good to continue mining like this, or must i change something??

I do know about GPU, but wanna to try with what i have first. and there's another problem about GPU, are always out of stock

GPU mining seems to be the standard these days. I dont think CPUs are equipt for the mining requirement. Having said that, from what I understand its pretty difficult now to mine successfully and it takes a long time to recoup your investment...

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